Carbs vs Fat in the Diet – Kevin Hall, NIH

>>I’m Dr. Kevin Hall. I’m at the National Institute
of Diabetes Digestive and Kidney Disease, here in the
National Institutes of Health. And my research is primarily
regarding how does the body adapt to different diets, and
in particular the macronutrients of the diet; that
is the carbohydrate, the fat and the protein. What happens when we manipulate
those in a very controlled way to people’s metabolism, as well
as how their brain responds to those changes
in diet over time. The body actually
responds very differently to when you cut carbohydrates,
for example, compared to cutting fat. So metabolically those are
very different manipulations of the diet. Changes in hormones,
for example, insulin being a primary
hormone, changes quite a lot when you reduce carbohydrates in
the diet, virtually not at all when you reduce fat in the diet. And that has all sorts of
downstream effects in terms of which fuels are being
burned by the body, how different organs are– are actually metabolizing
fuels differently, as well as what’s happening
in the brain and that’s one of the unique aspects of this
research is that we’re able to bring together people with
expertise in both the diet, the metabolism, as well
as the neuroscience of how the brain
responds to food images and food cues all
within one study.

3 Replies to “Carbs vs Fat in the Diet – Kevin Hall, NIH”

  1. Kevin Halls study (who is funded by the sugar industry for what its worth)

    The study was done (a pilot) by low-carb naysayers. Influential folks who had spent their careers insisting that a calorie is a calorie (Kevin Hall) no harm right? That way the results of the studies wouldn’t seem tainted because pretty much everyone knows that researchers can see what they want to see. They are afflicted with the confirmation bias themselves. So if nonbelievers did the study, no one would question the results. Kind of like an organization of atheists hiring a bunch of cardinals from the Vatican to do a study they think will demonstrate that God doesn’t exist. Sounds like a good idea, but you can see how it could go wrong.

    Think about it. If you spent 15 years of your academic career insisting that a calorie is a calorie, would you like to publish a study with strong data more or less negating what you’ve been saying all your working life? Especially if you had publicly ridiculed that philosophy in years gone by? If you were Kevin Hall and you spent the last year insisting that low-fat diets were the best way to lose weight, there are some who are unbiased (Gardner’s Stanford Atkins study) but not many.

    As Kevin is a Govt employee it seems to an outsider that Hall may be at least under the influence of the sort of activities exposed recently around Nina Teicholz.

    The preservation of the Dietary Guidelines and the reputations of the anointed in this field appear to be high priorities. I hope some US residents dig into this with FOI requests and expose the backstage agenda.

    The US Govt is the grain cabal, you need look no further than the Words “National Institute…” to see the problem. Look at his graphs and you will see the USDA and Kevin Hall at the bottom, they have to protect whatever last of bad nutrition science they are holding onto, wouldn’t you think?

    They went with 140 grams of carbohydrates per day, so their macro nutritient composition was the kind that those in the ketogenic camp have repeatedly argued is awful and ineffective, in the sense that the body doesn't permanently change the way it metabolizes fat (ketosis) and the desired effects fail to appear. And then they went on and put just 19 people on the diet for six days only, even though a lot of these diets call for an adaptation period that is longer. I don't understand those choices – either increase the days (difficult and costly, sure) or, much better, go ultra low carb right away. And increase the number of participants – within-subject is a strong design, but 19 people is still very little. If they did those things, maybe it wouldn't be the case that half of their comparisons aren't statistically significant, even without accounting for their multitude. In this form, the study is interesting, but it should be much stronger. And what types of fats were used on subjects? The study never said, could have been vegetable oils for all we know.

    The study wasn’t set up to test the insulin hypothesis as the word “insulin” does not even appear in the NCT trial registration. The primary outcome was energy expenditure, and should be the big thing on his poster. Body mass and fat mass didn’t get a mention either.

    if a calorie is a calorie, and insulin is not a factor – how does one explain (undiagnosed) type 1 diabetics who can eat mass quantities and still lose weight?.. Seems this alone would invalidate his “theory”

    Even the former popular blogger Stephan Guyenet stated as to how all Type 1 (insulin deficient) diabetics were immensely fat and all Type 2 (insulin resistant) diabetics were very slim.

    Too long to post here, just read the breakdown of Kevin Halls study here by an unbiased physician I might add

    Dr Michael Eades MD rebuttal of Kevin Halls study

    And don’t pull the “there biased” card, or that they wrote books, or Dr Eades adheres to low carb dieting, I can make the same argument for Kevin Hall who works for NIH who’s in cahoot with the USDA to protect their failed nutrition science,

    Dr Gardner (unbiased and a vegetarian) Stanford Atkins diet study,

    Stick to science and facts, which Kevin Hall likes to reword so it fits in with his employer the NIH National Institute of Health

    Studies done by people like Kevin Hall just confuse and make it harder for normal people to improve their health and understand health information, it isn’t who is right or who is wrong, emotions and personal interests never belong in science, if you like to be a vegan, great, if you like The Atkins Diet great, but we may be talking about the same things, when you look close, they both cut out refined grains, white rice, table sugar, syrups, pasta, sodas with sugar, juices, and they both think healthy fats, protein, and vegetables are the way to improve health and longevity.

  2. Who is the best fat loss guru in the 1st world?
    Ray Cronise. Read PRESTO! By Penn Jillette. Listen to every video, podcast and read every book and paper that Ray Cronise is involved with. No Dogma, no funding, just expert plan for bulletproof, fast, sustainable fat loss and weight management.

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